Having the different rates of thermal expansion between the SS manifolds and the heads will eventually crack the manifolds. Beefing up the welds and welding on a rod to support the weight of the turbo will significantly delay cracks forming at the welds, but it will eventually happen no matter who makes the manifolds. This wouldn't be OK for a daily driver, but for the "garage queen" Z's that aren't driven much they could last quite a while. Good luck in choosing, I went from JWT Sport 600's to TD-05's to GT 2530's (choosing, not actually buying :)).
